Antenna calibration using two-way communications

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may receive, from a second network node, a first set of reference signals, wherein receiving the first set of reference signals comprises receiving each reference signal using a respective antenna element of the first network node. The first network node may transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the plurality of antenna elements of the first network node. The first network node may receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals. Numerous other aspects are described.

What is claimed is: 
     
       1. A first network node for wireless communication, comprising:
 a memory; and 
 one or more processors, coupled to the memory, configured to:
 receive, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node; 
 transmit, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with at least one antenna element of the set of antenna elements of the first network node; and 
 receive, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals. 
 
 
     
     
       2. The first network node of  claim 1 , wherein the one or more processors are further configured to determine a set of calibration adjustment coefficients, corresponding to the plurality of antenna elements of the first network node, based at least in part on the first set of reference signals and the second set of reference signals. 
     
     
       3. The first network node of  claim 2 , wherein the one or more processors, to transmit the second set of reference signals, are configured to transmit the second set of reference signals based at least in part on the set of calibration adjustment coefficients. 
     
     
       4. The first network node of  claim 1 , wherein the first network node comprises a user equipment. 
     
     
       5. The first network node of  claim 1 , wherein the first network node comprises a first portion of a full-duplex capable wireless communication device, and wherein the second network node comprises a second portion of the full-duplex capable wireless communication device. 
     
     
       6. The first network node of  claim 1 , wherein the first set of reference signals comprise signals associated with carrier frequencies corresponding to a millimeter band or a higher frequency band than the millimeter band. 
     
     
       7. The first network node of  claim 1 , wherein a first beam weight of the first set of beam weights has a different value than a second beam weight of the first set of beam weights. 
     
     
       8. The first network node of  claim 1 , wherein the second network node comprises an antenna array having a plurality of antennas, and wherein the first set of beam weights comprises a first beam weight associated with a first antenna element of the antenna array and a second beam weight associated with a second antenna element of the antenna array. 
     
     
       9. The first network node of  claim 8 , wherein the one or more processors are further configured to receive a third set of reference signals using the antenna array, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element. 
     
     
       10. The first network node of  claim 8 , wherein the first beam weight is associated with the first antenna element based at least in part on a configured order of beams. 
     
     
       11. The first network node of  claim 8 , wherein the first beam weight is associated with the first antenna element based at least in part on a beam weight cycling configuration. 
     
     
       12. The first network node of  claim 1 , wherein the one or more processors, to receive the first set of reference signals, are configured to:
 receive a first reference signal of the first set of reference signals before transmission of a first reference signal of the second set of reference signals; and 
 receive a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission of a second reference signal of the second set of reference signals. 
 
     
     
       13. The first network node of  claim 1 , wherein the one or more processors, to receive the first set of reference signals, are configured to receive each reference signal of the first set of reference signals before transmitting any reference signal of the second set of reference signals. 
     
     
       14. The first network node of  claim 1 , wherein receiving the first set of reference signals comprises receiving the first set of reference signals based at least in part on a configured reception pattern, wherein the configured reception pattern indicates an order of reception of each reference signal of the first set of reference signals relative to transmission of each reference signal of the second set of reference signals. 
     
     
       15. The first network node of  claim 1 , wherein the one or more processors, to receive the first set of reference signals, are configured to:
 receive, using a first antenna element of the plurality of antenna elements of the first network node, a first reference signal of the first set of reference signals before transmission, using the first antenna element, of a first reference signal of the second set of reference signals; 
 receive, using a second antenna element of the plurality of antenna elements of the first network node, a second reference signal of the first set of reference signals after transmission of the first reference signal of the second set of reference signals and before transmission, using the second antenna element, of a second reference signal of the second set of reference signals; 
 receive, using the first antenna element, a first reference signal of a third set of reference signals before transmission, using the first antenna element, of a first reference signal of a fourth set of reference signals; and 
 receive, using a third antenna element of the plurality of antenna elements, a third reference signal of the first set of reference signals after transmission of the first reference signal of the fourth set of reference signals and before transmission, using the third antenna element, of a third reference signal of the second set of reference signals. 
 
     
     
       16. A second network node of a first network node and the second network node for wireless communication, comprising:
 a memory; and 
 one or more processors, coupled to the memory, configured to:
 transmit, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights; 
 receive, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node; and 
 transmit, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals. 
 
 
     
     
       17. The second network node of  claim 16 , wherein the first network node comprises a user equipment. 
     
     
       18. The second network node of  claim 16 , wherein the first network node comprises a first portion of a full-duplex capable wireless communication device, and wherein the second network node comprises a second portion of the full-duplex capable wireless communication device. 
     
     
       19. The second network node of  claim 16 , wherein the second set of reference signals comprise signals associated with carrier frequencies corresponding to a millimeter band or a higher frequency band than the millimeter band. 
     
     
       20. The second network node of  claim 16 , wherein a first beam weight of the first set of beam weights has a different value than a second beam weight of the first set of beam weights. 
     
     
       21. The second network node of  claim 16 , wherein the first network node comprises an antenna array having a plurality of antennas, and wherein the first set of beam weights comprises a first beam weight associated with a first antenna element of the antenna array and a second beam weight associated with a second antenna element of the antenna array. 
     
     
       22. The second network node of  claim 21 , wherein the one or more processors are further configured to receive a third set of reference signals, wherein a third beam weight is associated with the first antenna element and a fourth beam weight is associated with the second antenna element. 
     
     
       23. The second network node of  claim 21 , wherein the first beam weight is associated with the first antenna element based at least in part on a configured order of beams. 
     
     
       24. The second network node of  claim 21 , wherein the first beam weight is associated with the first antenna element based at least in part on a beam weight cycling configuration. 
     
     
       25. The second network node of  claim 16 , wherein the one or more processors, to receive the first set of reference signals, are configured to receive each reference signal of the first set of reference signals before transmitting any reference signal of the second set of reference signals. 
     
     
       26. The second network node of  claim 16 , wherein receiving the first set of reference signals comprises receiving the first set of reference signals based at least in part on a configured reception pattern, wherein the configured reception pattern indicates an order of reception of each reference signal of the first set of reference signals relative to transmission of each reference signal of the second set of reference signal. 
     
     
       27. A method of wireless communication performed by a first network node, comprising:
 receiving, from a second network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights, and wherein receiving the first set of reference signals comprises receiving each reference signal of the first set of reference signals using a respective antenna element of a plurality of antenna elements of the first network node; 
 transmitting, to the second network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with an antenna element of the set of antenna elements of the first network node; and 
 receiving, from the second network node, an estimation report comprising estimation information associated with the second set of reference signals. 
 
     
     
       28. The method of  claim 27 , further comprising determining a set of calibration adjustment coefficients, corresponding to the plurality of antenna elements of the first network node, based at least in part on the first set of reference signals and the second set of reference signals. 
     
     
       29. A method of wireless communication performed by a second network node of a first network node and a second network node, the method comprising:
 transmitting, to the first network node, a first set of reference signals, wherein each reference signal of the first set of reference signals corresponds to a respective beam weight of a first set of beam weights; 
 receiving, from the first network node, a second set of reference signals, wherein the second set of reference signals is based on the first set of reference signals, and wherein each reference signal of the second set of reference signals is associated with a respective antenna element of the plurality of antenna elements of the first network node; and 
 transmitting, to the first network node, an estimation report comprising estimation information associated with the second set of reference signals. 
 
     
     
       30. The method of  claim 29 , wherein the first network node comprises a user equipment.